A sample of seawater contains 1.3 g of calcium ions in 3,100 kg of solution. what is the calcium ion concentration of this solution in units of ppm?

Aside from carbon and hydrogen, which are always present in organic molecules, what are some other substances they may contain?

Which balanced equation represents a spontaneous radioactive decay? 1. 14C + Ca3 (PO4) 2 → 3CaC2 + 2P + 8CO 2. 3. H2CO3 → H2O + CO2 4.

What number is considered neutral? (On the pH scale)

What would you expect to happen to the air pressure as a storm approaches? Question 7 options: A. It would increase B. It would decrease C. It would remain the same

What term best describes the rate of radioactive decay for a particular radioactive element? A. fast B. slow C. variable D. constant

The ideal gas law shows us how a gas will behave under many conditions. The formula is: P V = n R T Where P = pressure, V = volume, n = amount of the substance, R = ideal gas constant, and T = temperature.

The Suns ultraviolent Rays can cause skin damage including sunburn and even skin

Peas contain 250 kJ per 100 g. You would use the equivalent of 600 g of peas if you slept for.

A sample of gas in a balloon has an initial temperature of 21 ∘C and a volume of 1310 L. If the temperature changes to 70 ∘C, and there is no change of pressure or amount of gas, what is the new volume, V2, of the gas?

Which is a waste product of aerobic respiration? A. water B. energy C. oxygen D. glucose